a)x+38=100
x=100-38
x=62
b)8+x=26
x=26-8
x=18
c)x-15=12
x=15+12
x=27
d)x+29=56
x=56-29
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x=62
b) x=26-8
x=18
c) x=12+15
x=27
d) x=56-29
x=27
Espero que te sirva!
a)x+38=100
x=100-38
x=62
b)8+x=26
x=26-8
x=18
c)x-15=12
x=15+12
x=27
d)x+29=56
x=56-29
x=27